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| Registros recuperados: 10 | |
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| Mahe, Kelig; Bellail, Robert; Dufour, Jean-louis; Boiron-leroy, Anne; Dimeet, Joel; Duhamel, Erwan; Elleboode, Romain; Felix, Jerome; Grellier, Patrick; Huet, Jerome; Labastie, Jacques; Le Roy, Didier; Lizaud, Oceann; Manten, Marie-line; Martin, Stephane; Metral, Luisa; Nedelec, Daniel; Verin, Yves; Badts, Vincent. |
| This document presents all the techniques used in routine by Ifremer to estimate the age of fish from the calcified piece. The procedure for estimating age describes each technical stage from the taking of the calcified piece through to the supplying of key sizes/ages to the European work groups. This procedure is specific to each species and even each population of fish. |
| Tipo: Text |
Palavras-chave: Poisson; TNPC; Préparation; Procédure; Age; Ecaille; Illicium; Otolithe; Sclérochronologie; Fish; TNPC; Preparation; Procedure; Age; Scale; Illicium; Otolith; Sclerochronology. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00000/7294/rapport-7294.pdf |
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| Artero, C.; Murie, D. J.; Koenig, C. C.; Berzins, R.; Bouchon, C.; Lampert, Luis. |
| The age and growth of the Critically Endangered Atlantic goliath grouper Epinephelus itajara of equatorial French Guiana was determined by a non-lethal aging method using dorsal fin rays. Goliath grouper deposit 1 complete annulus per year, with the translucent zone of the annulus laid down at the beginning of the dry season (July). Two readers independently applied the method; there was full agreement between the two for 52% of the fish, and agreement of +/- 1 yr for 82%. Comparison of ages derived from paired samples of otoliths and fin rays were identical (n = 6). The mean age of goliath grouper was 4.2 yr (range = 1 to 17 yr; n = 229); 82% of the individuals were under the size/age of sexual maturity. Goliath grouper in French Guiana are larger at a... |
| Tipo: Text |
Palavras-chave: Epinephelidae; Critically Endangered species; Sclerochronology; Fin rays; MPA. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00292/40320/38759.pdf |
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| Poulain, C.; Gillikin, D. P.; Thebault, Julien; Munaron, Jean-marie; Bohn, M; Robert, Rene; Paulet, Yves-marie; Lorrain, Anne. |
| The influence of salinity and water chemistry on Mg/Ca, Sr/Ca and Ba/Ca ratios in the aragonitic shells of the Manila clam were investigated. Clams were reared at constant temperature (20 °C) under different controlled conditions of salinity, commonly encountered in their natural habitat. Clams were held in three tanks with a constant salinity of 35 for the first 35 days and then two tanks were changed to lower salinities (20 and 28) for the next 29 days. Individual shell Mg/Ca, Sr/Ca and Ba/Ca ratios were studied through time. Despite stable conditions (temperature, salinity, and Mg/Cawater) for clams reared at salinity 35 during the experiment, Mg/Ca shell ratios increased through the time. Moreover the salinity decrease at t35 slowed the increase of... |
| Tipo: Text |
Palavras-chave: Ruditapes philippinarum; Aragonite; Sclerochronology; Bivalved mollusk; Trace element; Proxy. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00245/35649/34158.pdf |
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| Guillaud, Emilie; Elleboode, Romain; Mahe, Kelig; Bearez, Philippe. |
| The fish remains sampled from archaeological sites are generally the result of human food refuse; therefore, the study of retrieved fish scales may provide reliable information on the season of capture and on paleoclimate and paleoenvironmental changes. Among Western European freshwater fishes, the grayling, Thymallus thymallus¸ has the most easily recognizable scales and is a commonly recovered species from Paleolithic contexts. This study, therefore, is based on the growth pattern analysis of modern and archaeological scales from grayling specimens. The modern specimens were collected monthly in France (n = 22), Switzerland (n = 16), Finland (n = 20) and Sweden (n = 10). Scale growth patterns were measured using numerical analysis to a high accuracy. The... |
| Tipo: Text |
Palavras-chave: France; Le Taillis des Coteaux; Marginal increment analysis; Scales; Scalimetry; Sclerochronology; Thymallus thymallus; Upper Paleolithic. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00379/48992/49436.pdf |
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| Peharda, Melita; Thebault, Julien; Markulin, Kresimir; Schone, Bernd R.; Janekovic, Ivica; Chauvaud, Laurent. |
| High-resolution stable-isotope ratio data (delta O-18, delta O-18) were used to study growth strategies of two bivalve species, Pecten jacobaeus (calcitic shell) and Glycymeris pilosa (aragonitic shell) from the North Adriatic Sea. The principal objectives of this study were to identify the period of the year when the growth line is formed in the shell of two target species, to identify the main growing season of these two species, to identify the environmental drivers of shell growth, and to evaluate the potential applicability of delta O-18 and delta O-18 values for the reconstruction of environmental variability. Samples were collected from the North Adriatic Sea by commercial bean trawl (P. jacobaeus, December 2013 and January 2014, N = 4) and SCUBA... |
| Tipo: Text |
Palavras-chave: Sclerochronology; Mediterranean; Adriatic; Stable-isotope ratio geochemistry; Bivalve shells. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00615/72753/74907.pdf |
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| Poitevin, Pierre; Thébault, Julien; Siebert, Valentin; Donnet, Sébastien; Archambault, Philippe; Doré, Justine; Chauvaud, Laurent; Lazure, Pascal. |
| The Northwest Atlantic is a key region with an essential role in global climate regulation, redistributing heat and influencing the carbon cycle. However, little is known about its evolution before 1950, mainly because of the lack of long-term instrumental measurements. The hard parts of long-lived marine biota hold the potential to extend instrumentally derived observation by several decades or centuries and enhance our understanding of global climate processes. Here, we investigate the effects of local, regional, and large-scale climate variability on the marine bivalve, Arctica islandica (Linnaeus, 1767) from Saint-Pierre and Miquelon (SPM). This archipelago lies at the boundary zone between the cold Labrador Current in the north and the warm Gulf... |
| Tipo: Text |
Palavras-chave: Arctica islandica; Paleoecology; North Atlantic; Sub polar gyre; Labrador current; Bivalve; Sclerochronology; Climate change. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00509/62050/66198.pdf |
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| Olivier, Frederic; Gaillard, Blandine; Thebault, Julien; Meziane, Tarik; Tremblay, Rejean; Dumont, Dany; Belanger, Simon; Gosselin, Michel; Jolivet, Aurelie; Chauvaud, Laurent; Martel, Andre L.; Rysgaard, Soren; Olivier, Anne-helene; Pettre, Julien; Mars, Jerome; Gerber, Silvain; Archambault, Philippe. |
| Climate changes in the Arctic may weaken the currently tight pelagic-benthic coupling. In response to decreasing sea ice cover, arctic marine systems are expected to shift from a 'sea-ice algae-benthos' to a 'phytoplankton-zooplankton' dominance. We used mollusc shells as bioarchives and fatty acid trophic markers to estimate the effects of the reduction of sea ice cover on the food exported to the seafloor. Bathyal bivalve Astarte moerchi living at 600m depth in northern Baffin Bay reveals a clear shift in growth variations and Ba/Ca ratios since the late 1970s, which we relate to a change in food availability. Tissue fatty acid compositions show that this species feeds mainly on microalgae exported from the euphotic zone to the seabed. We, therefore,... |
| Tipo: Text |
Palavras-chave: Arctic; Climate change; Sclerochronology; Pelagic-benthic coupling; Match; Mismatch hypothesis; Bivalve growth. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00686/79854/82695.pdf |
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| Huyghe, Dimitri; Emmanuel, Laurent; De Rafelis, Marc; Renard, Maurice; Ropert, Michel; Labourdette, Nathalie; Lartaud, Franck. |
| For decades, bivalve shells have constituted one of the most common supports for paleoclimatic archives based on stable isotope approaches. In this work, we conducted chemical marking and recapture techniques to study the fluctuation of δ18O values of oyster shells of the species Magallana gigas reared in natural environment in Normandy (France) for two years. The results were compared to the continuous monitoring of temperature and salinity and monthly records of seawater δ18O. Isotopic measurements were performed on the hinge area that regroups the whole life of the oysters. Here we demonstrate that oysters mineralized their shells with no significant growth breaks during the two-years experiment, even at temperatures below 6 °C. The results confirm that... |
| Tipo: Text |
Palavras-chave: Stable isotopes; Paleoclimatology; Sclerogeochemistry; Sclerochronology; Kinetic isotope effect. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00624/73622/73038.pdf |
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| Ruas,Lygia C.; Vaz-dos-Santos,André M.. |
| ABSTRACT The rough scad, Trachurus lathami Nichols, 1920, is a small pelagic species distributed along the West Atlantic coast. It is most abundant in the Southern Brazil (28°30’-34°S) and in the Southeastern Brazilian Bight (SEBB, 22°-28°30’S). The rough scad is fished by purse seines, which main target is the Brazilian sardine, Sardinella brasiliensis (Steindachner, 1879). Age and growth are vital to understand the life cycle of a species, to fishery management and ecosystem modeling. This study aimed to assess the age and growth of T. lathami, to identify its age structure in the SEBB, and to evaluate what causes the wide differences among Trachurus species in terms of body size and growth parameters. Data available on T. lathami was attained between... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: ECOSAR; Otolith; Sclerochronology; Von Bertalanffy. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100324 |
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| Registros recuperados: 10 | |
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